Paper can or carton



L. C. BROOKS PAPER CAN OR CARTON July 17, 1923.

Filed Aug. 21, 1916 I r l 1 I 1 v v l l l I I INVENTOR WITNESSES paper the para Patented July 17, 1923.

NE TE M t @FEQQ LEwIs o. BROOKS, or MILWAUKEE, wIsooNsIN, ASSIGNOR, BY MEsNE ASSIGNMENT$, TO THE NATIONAL PAPER CAN COMPANY, or MILWAUKEE, WISCONSIN, A core PORATIQN OF WISCONSIN.

Application filed. August 21, 1916. Serial No. 115,962.

To all whom it may concern:

, Be it known that I, LEWIS C. BROOKS, a citizen of the United States, residing at Milwaukee, Milwaukee County, Wisconsin, have invented a new and useful Improvement in Paper Cans or Cartons, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 illustrates a paper can or carton, partly in vertical section, embodying the invention, and

Figure 2 is a lan view, taken partly in section, of the p ug cap or closure of the can.

The object of the invention is to produce a paper can or carton, all of the parts of which are uniformly water-proofed, greaseproofed, or the like, and impervious to moisture, grease, or the like. Heretofore,'wh1le 'it has'been thepractiee to build up the walls of a cylindrical paper can by winding-a strip of paper saturated with a suitable proofing material, such as hot paralfine, around a mandrel to form a multi-ply wall, the end closures have been made of heavy paper or cardboard, which is dipped in parafiineor other proofing material. While the side walls, by virtue of the fact that they are formed of a plurality of plies of previously paraflined paper, resist moisture, the end closures have not resisted moisture as well as the side walls. This is due to the fact that when a single thickness of heavy paper or cardboard is impregnated, the melted paraffine, while impregnating the surface'of the paper, does not as thorou hly penetrate and impregnate the intermediate body portion; whereas in building up a laminated-sheet from a pluralit ,of impregnated lies of fli ne may be driven 1nto the pores of the different plies so that the inner v plies are as thoroughly waterproofedand as im ervious to moisture asthe outer plies.

eferring tothe drawmgs, which illustrate one embodiment of the presentinven:

tion, the side wall 1 of the cylin rical can 2 is made up by winding a strip of paper around a mandrel. saturated with hot parafline, as it is wound onto the mandrel and the plies are pressed together and, consolidated, thus forming a compound sheet'built up of a plurality of The strip. of paper is plies previously impregnated with parafiine.

The inner and outer bottom end closures 3 and 4 are made up of a plurality of plies of paper, thoroughlyimpregnated with some waterproofing material such as parafline, which are consolidated under pressure into a solid sheet. This forms a unifoimly impregnated, thoroughly water-proofed end closure. The upper closure of the can is formed by a closure-piece 5, which, as shown in the drawings, has a circular hole cut in it, in which is inserted a friction plug 6. Both the closure 5 and the plug 6 are built up similar to the bottom closure-pieces 3 and 4.

The top and bottom end closures are as thoroughly impregnated with the proofing material as the sidewalls, and it is found that with a can so made, the end closures, as well as the side walls, will remain impervious to water almost indefinitely. It is possible to use such cansfor holding wet materials for considerable periods of time, a thing which has been impracticable with an all-paper can having the closures heretofore used.

The drawings merely illustrate one of many kinds of paper cans or cartons to which the invention may be applied.

The present invention is also applicable to the manufacture of in which the material 1s proofed with some other proofing solution beside a waterproofing solution. For example, the various plies of paper may be impregnatedwith a greaseproofing solution.

aper cans or cartons The present invention is therefore not limited to its illustratediembodiment, but may be otherwise embodied within the scope of the following claims.

I claim:

1. An all-paper can or carton for thestorage and preservation of foodproducts havinga. bodyportion formed of a strip of aper previously impregnated with parafne, wound on itself and consolidated into a seamless unbroken laminated shell, and closures attached to both ends of the body portion, each closure being built'u of a plurality of layers of paper revious y impreg nated with parafiinc an consolidated into an unbroken laminated sheet; substantially as described.

2. An all-paper can on carton for the storage and preservation of food products having a body portion formed of a strip of paper previously impregnated with a proofing compound, Wound on itself and consolidated into a seamless unbroken laminated shell, and closures attached to both ends of the body portion, each closure comprising a plurality of "layers of paper previously impregnated witha proofing material and consolidated into an unbroken laminated sheet; substantially as described.

An all-paper can or carton for the storage and preservation of food products having a body portion formed of a strip of paper previously impregnated with a material which renders the paper impervious to grease or impervious to moisture, wound on itself and consolidated into a seamless unbroken laminate-d shell, and closures attached to both ends of the body portion, each closure comprising a plurality of layers of paper previousl impregnated with :a material which ren ens the paper impervious to grease or impervious to moisture and consolidated into an unbroken laminated sheet substantially as described.

4. A can or carton for the storage and preservation of food products having a body.

portion formed of a strip of paper previously impregnated with a proofing compound, wound on itself and consolidated into a seamless unbroken laminated shell, and a closure attached to an end of the body por tion, such closure comprising a plurality of layers of paper previously impregnated with a proofing material and consolidated into an unbroken laminated sheet, substantially as described.

5. A can or carton for the storage and preservation of food products having a body portion formed of. a strip of paper previously impregnated With-:amaterial which is impervious to grease or impervious to moisture, wound on itself and consolidated into a seamless unbroken laminated shell, and a closure attached to .an end of the body portion,such :closure comprising a plurality of layers of pa er previously impregnated with a materia which renders the paper impervious to :grease or impervious to moisture and consolidated into an unbroken laminated sheet, substantially as described.

I In testimony whereof, I have hereunto set "my hand.

LEWIS c. BROOKS. 

